Lab

Purpose: To find the amount of dissolved oxygen at different temperatures and varying amounts of light in water samples.

Procedures:
Temperatures:
1 Get ten different fresh water samples at varying degrees, which are ten degrees apart.
2 Use the measuring kit to test the oxygen saturation levels.
3 Make a graph.

Light:
1 Fill ten BOD bottles with aquatic culture, not agitate the samples.
2 Seal the bottle with caps, to prevent air entrapment.
3 Write the percent of light each sample will get.
4 Wrap bottles in screen or foil.
5 Test DO of the initial bottle.
6 Place all the bottles on their sides in a tray under a fluorescent light for 24 hours.

Results: Water in light will have more oxygen than water in less light. Water in cold temperatures will have more oxygen than warm water.